Paper Chromatographic Identification of Carbonyl Compounds as Their 2,4-Dinitrophenylhydrazones in Automobile Exhaust.

Barber, Ethel D.; Lodge, James P.

doi:10.1021/ac60196a024

Cited by 20 publications

(8 citation statements)

References 25 publications

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“…Since CH20 is believed to be formed from methane oxidation by OH radicals [Levy, 1971], reaction (4) followed by (5) will recycle the radical used in the primary step (OH + CH4 --, H20 4-CH3). In polluted air, where CH20 is directly emitted by traffic [Barber and Lodge, 1963], it can be a strong net source of radicals.…”

Section: Cho + 02 --"> Co 4-ho2mentioning

confidence: 99%

Direct measurements of atmospheric CH₂O, HNO₂, O₃, NO₂, and SO₂ by differential optical absorption in the near UV

Platt¹,

Perner²

1980

J. Geophys. Res.

292

107

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Measurements of CH2O, HNO2, O3, NO2, and SO2 at four different sites in western Europe are reported. At the maritime sites (Loophead, Ireland, and Dagebüll, Germany) the mixing ratios of the pollution indicators SO2 and NO2 are <0.5–2 ppb, while concentrations of several tenths of a part per billion of CH2O are consistent with photochemical equilibrium. HNO2 was only found at continental sites (Jülich and Deuselbach) with SO2 and NO2 mixing ratios up to 100 ppb. Surprisingly, NO3 was found to be at least 10 times lower than expected in most cases.

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Section: Cho + 02 --"> Co 4-ho2mentioning

confidence: 99%

Direct measurements of atmospheric CH₂O, HNO₂, O₃, NO₂, and SO₂ by differential optical absorption in the near UV

Platt¹,

Perner²

1980

J. Geophys. Res.

292

107

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“…Technol., Vol. 16 retention time criterion; (D) follows plot of carbon number vs. retention time in homologous series. 6 This species is in a region where the relationship between boiling point and retention time changes slope.…”

Section: Resultsmentioning

confidence: 99%

Hydrocarbon gases emitted from vehicles on the road. 1. A qualitative gas chromatography/mass spectrometry survey

Hampton¹,

Pierson²,

Harvey³

et al. 1982

Environ. Sci. Technol.

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The gas-phase hydrocarbons >C5 generated by motor vehicles in highway operation were surveyed in the Allegheny Mountain Tunnel of the Pennsylvania Turnpike in 1979. The samples were collected on Tenax GC polymer adsorbent and analyzed by glass-capillary gas chromatography/mass spectrometry. Approximately 400 vehicle-generated compounds were detected. Of these, over 300 were either completely or partially identified. In the various tunnel samples the same peaks are always present, with relative intensities varying according to the traffic composition. The compounds identified fall largely into homologous series of normal and branched alkanes, alkenes, and various alkyl series based on cyclopentane, cyclohexane, benzene, styrene, indan, naphthalene, and decalin. Compounds not associated with homologous series include indene, divinylbenzene, phenylacetylene, benzaldehyde, phenol, and a few halocarbons. Results from a preliminary experiment in 1977 at the Tuscarora Mountain Tunnel are also reported. Table III. Exhaust Gases (D = Diesel, G = Gasoline Engine) Reported in the Literature but Not Identified at Allegheny Tunnel 1979" vehicle type ref 2,2-dimethylbutane G

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Section: ■ Introductionmentioning

confidence: 99%

“…Airborne carbonyl compounds such as formaldehyde, acrolein, and methyl ethyl ketone have long been chemicals of concern in the environment. Carbonyls are common as both primary pollutants formed by incomplete combustion and secondary pollutants formed as intermediates during photo-oxidation of other organic compounds . A number of carbonyl compounds have been shown to be toxic and/or carcinogenic. , Carbonyls play an important role in atmospheric chemistry as a major source of free radicals, in forming secondary pollutants including ozone and peroxyacyl nitrates (PANs), , and in the formation and growth of secondary organic aerosols (SOAs) …”

Section: Introductionmentioning

confidence: 99%

Diversity of Carbonyl Compounds in Biogas and Natural Gas Revealed Using High-Resolution Mass Spectrometry and Nontarget Analysis

Alaimo

Green

et al. 2021

Environ. Sci. Technol.

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Airborne carbonyl compounds such as formaldehyde, acrolein, and methyl ethyl ketone have long been chemicals-of-concern in the environment due to their reactivity and their potential for negative health effects. Standard methods for determining carbonyls in air, which focus on a set of 15 or fewer compounds, involve derivatization to form nonvolatile hydrazones, which can readily be analyzed via liquid chromatography (LC) with ultraviolet detectors. Here, we apply a new LC-high-resolution mass spectrometry (HRMS) method to natural gas and a variety of upgraded biofuels to better assess their total carbonyl profile using the inherent selectivity of the standard sampling methodology and the selectivity and sensitivity of HRMS. The standard method accounted for only 64% of the total carbonyl content in natural gas and between 26 and 45% of the total carbonyl content in biogas sources, with the balance detected by the new LC/HRMS method. An additional 540 compounds with molecular formulas consistent with carbonyl compounds were detected compared to only 14 target compounds using the standard method. These results demonstrate that the established method dramatically under-reports both the total carbonyl load and the diversity of carbonyl species in natural gas and biogas samples.

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Paper Chromatographic Identification of Carbonyl Compounds as Their 2,4-Dinitrophenylhydrazones in Automobile Exhaust.

Cited by 20 publications

References 25 publications

Direct measurements of atmospheric CH₂O, HNO₂, O₃, NO₂, and SO₂ by differential optical absorption in the near UV

Direct measurements of atmospheric CH₂O, HNO₂, O₃, NO₂, and SO₂ by differential optical absorption in the near UV

Hydrocarbon gases emitted from vehicles on the road. 1. A qualitative gas chromatography/mass spectrometry survey

Diversity of Carbonyl Compounds in Biogas and Natural Gas Revealed Using High-Resolution Mass Spectrometry and Nontarget Analysis

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Paper Chromatographic Identification of Carbonyl Compounds as Their 2,4-Dinitrophenylhydrazones in Automobile Exhaust.

Cited by 20 publications

References 25 publications

Direct measurements of atmospheric CH2O, HNO2, O3, NO2, and SO2 by differential optical absorption in the near UV

Direct measurements of atmospheric CH2O, HNO2, O3, NO2, and SO2 by differential optical absorption in the near UV

Hydrocarbon gases emitted from vehicles on the road. 1. A qualitative gas chromatography/mass spectrometry survey

Diversity of Carbonyl Compounds in Biogas and Natural Gas Revealed Using High-Resolution Mass Spectrometry and Nontarget Analysis

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Product

Resources

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Direct measurements of atmospheric CH₂O, HNO₂, O₃, NO₂, and SO₂ by differential optical absorption in the near UV

Direct measurements of atmospheric CH₂O, HNO₂, O₃, NO₂, and SO₂ by differential optical absorption in the near UV